一类正负相间方幂和中因子5的指数

The Exponent of Factor 5 in Power Sum Alternated with Positive and Negative

设 n =5 am ,本文给出下面正负相间方幂和中因子 5的指数公式 ∑2 n- 1k=0(- 1) k[x +dk]r,d =5 s+2 .

Let n,x,r be positive integer, n=5\+am, 5m . The exponent of factor 5 in power sum altemated with positive and negative: ∑2n-1k=0(-1)\+k\+r, d=5s+2.